Ultrasonic Equipment Flashcards
(50 cards)
Define power supply
Provides voltage from ac or batteries. To drive other instrument circuts.
Define clock
Initiates the chain of events that result in one complete cyle in and ultrasonic test
What does the clock do?
Emits a signal to the time base and pulse , which then is repeated at a given frequency at regular, evenly spaced intervals called pulse repetition rate or update rate.
Define pulser
Sends initial pulse to transducer causing sound to enter test object,( the inital pulse is a fast rising high voltage that activates transducer.
A lower voltage pulse produces better?
Resolution
Define timebase?
Initiates time/distance display on the instruments horizontal scale.
Sound travel time is displayed as
Diatance
Define reciever amplifier
The inital pulse goes to reciever/amplifier after amplification the signal is sent to display
Regardless of the brand, pulse echo instruments have several components in common these include the
A. Generator, pulser, reciever, display and dual probe
B. Power supply, timer, sweep generator, pulser, reciever and display
C. Power supply timer generator pulser reciever and cathode ray tube
D. Timer sweep pulser reciever amplifier and clock circut
B. Power supply timer sweep generator pulser reciever and cathode ray tube
Which of the following provides short duration, high energy pulses which are used to excite the transducer A. The amplifier B. The clock C. The pulser D. The transducer
C. The pulser
Which of the following circuts provides timing signals to the pulser A. The clock B. The amplifier C. The power supply D. The reciever
A. The clock
The pulser (or pulse generator) is the source of short high energy burst of electrical energy applied to the transducer as the outbound energy source that begins the interaction between the test equipment and the material. True or False
True.
The pulse energy transmitted into the test object begins its journey as an electrical impulse of low 100 v medium or high as high as 400 v voltage.
True or False
True
The pulser circuit serves to modify the inbound pulses of energy to the probe and reciever circut.
True or False
False
The \_\_\_\_\_\_\_ voltage pulse produces better near surface \_\_\_\_\_\_\_\_ A. Lower, penetration B. Higher, resolution C. Lower, resolution D. All the above
C. Lower, resolution1
Crt stands for A. Critical registration trigger B. Crystal repetition tenure C. Cathode ray tube D. Computer recognition taser
C. Cathode ray tube
A scan is
A plot of the recieved wave amplitude vs time
A rectified wave does what?
Inverts all of the negative amplitude values to positive
An instrument display in which the horizontal base line represents elapsed time and the vertical deflection represents signal amplitude is called? A. An A scan B. A B scan C. A C scan D. A time line display
A. An A scan
Which display presents information in terms of time of flight and amplitude? A. An A scan B. A B scan C. A C scan D. All the above
A. An A scan
A\_\_\_\_\_\_ produces a two dimensional view of the cross sectional plane through the test object A. Bscan B. Laminar scan C. Cscan D. Roto scan
A. B scan
Reflector shaoe and position are more easily determind by use of the \_\_\_ scan technique A B C D
C
The B scan provides real time visulization of the material as its tested True or false.
True
An ultrasonic instrument control which allows moving an Ascan display to thr left or right without changing the distance between any displayed indications is called A. Damping control B. The range control C. The pulse length control D. The delay or zero offset control
The delay or zero offset control
